First in my understanding you dont need to convert it too long
Just make the 10th power same like exponent of 10's.
if u are comparing two number try to make their 10 ^x factor same
9.9810^6 kilogram 99810^4
7.310^7 kilogram 7310^6 this is greater
7310^6-99810^4
10^4(7300-998)
10^4( 6302)
630210^4 or u can write 6.30210^7 more
